PBT

‍PBT (Polybutylene Terephthalate) – Product Specifications

PBT is a semi-crystalline engineering thermoplastic known for its excellent mechanical strength, high heat resistance, good electrical insulation properties, and fast crystallization rate. It offers low moisture absorption and good dimensional stability, making it an ideal material for precision components in automotive, electrical, and electronic applications. PBT is often reinforced with glass fiber to further enhance strength and stiffness.

Key Parameters:

• Density: 1.30 – 1.35 g/cm³ (unreinforced) / 1.45 – 1.65 g/cm³ (glass fiber reinforced)

• Melting Point: 220 – 230°C

• Glass Transition Temperature (Tg): 40 – 60°C

• Tensile Strength: 50 – 60 MPa (unreinforced) / 100 – 150 MPa (30% glass fiber)

• Elongation at Break: 50 – 300% (unreinforced) / 2 – 5% (glass fiber reinforced)

• Flexural Modulus: 2000 – 3000 MPa (unreinforced) / 7000 – 10000 MPa (30% glass fiber)

• Izod Impact Strength (notched): 3 – 6 kJ/m² (unreinforced) / 8 – 12 kJ/m² (glass fiber reinforced)

• Water Absorption (24h): 0.07 – 0.09%

• Heat Deflection Temperature (HDT): 50 – 70°C (unreinforced at 1.82 MPa) / 200 – 215°C (30% glass fiber at 1.82 MPa)

• Continuous Use Temperature: 120 – 140°C

• Dielectric Strength: 15 – 25 kV/mm

• Volume Resistivity: 10¹⁵ – 10¹⁶ Ω·cm

• Processing Methods: Injection molding, extrusion

• Typical Applications: Automotive connectors, sensor housings, ignition components, electrical switches, relay bases, LED lighting components, industrial plugs, pump housings, gears, consumer electronics housings